CommunityToolkit.Mvvm (the MVVM Toolkit) core: source generators ([ObservableProperty], [RelayCommand], [NotifyPropertyChangedFor], [NotifyCanExecuteChangedFor], [NotifyDataErrorInfo]), base classes (ObservableObject / ObservableValidator / ObservableRecipient), commands (RelayCommand / AsyncRelayCommand), and validation.
Install
npx skills add github/awesome-copilot --skill mvvm-toolkitnpx skills add github/awesome-copilot --skill mvvm-toolkit -a claude-code -gnpx skills add github/awesome-copilot --skill mvvm-toolkit -a codex -ggemini skills install https://github.com/github/awesome-copilot.git --path skills/mvvm-toolkitgh skill install github/awesome-copilot mvvm-toolkitgit clone --depth 1 https://github.com/github/awesome-copilot /tmp/github__awesome-copilot
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/github__awesome-copilot/skills/mvvm-toolkit ~/.claude/skills/mvvm-toolkit # Claude Code
cp -R /tmp/github__awesome-copilot/skills/mvvm-toolkit ~/.agents/skills/mvvm-toolkit # Codex, Cursor, Gemini CLI, Copilot, OpenCode